A seagull flies between a Fusarium-infected palm tree (left) and a healthy palm (right) at Justin Herman plaza on the Embarcadero in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a tree fungus disease that is slowly killing them. less

A seagull flies between a Fusarium-infected palm tree (left) and a healthy palm (right) at Justin Herman plaza on the Embarcadero in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along ... more

A Fusarium-infected palm tree tagged for removal on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a tree fungus disease that is slowly killing them. less

A Fusarium-infected palm tree tagged for removal on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a ... more

A Fusarium-infected palm tree tagged for removal on the Embarcadero... Photo-4635342.62473 - GreenwichTime

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A Fusarium-infected palm tree tagged for removal on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a tree fungus disease that is slowly killing them. less

A Fusarium-infected palm tree tagged for removal on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a ... more

A Fusarium-infected palm tree tagged for removal on the Embarcadero... Photo-4635343.62473 - GreenwichTime

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A Fusarium-infected palm tree tagged for removal on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a tree fungus disease that is slowly killing them. less

A Fusarium-infected palm tree tagged for removal on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a ... more

A Fusarium-infected palm tree tagged for removal on the Embarcadero... Photo-4635344.62473 - GreenwichTime

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Taboola Gallery Frame Item-85307.62473 - GreenwichTime

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A Fusarium-infected palm tree sits next to healthy palms on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a tree fungus disease that is slowly killing them. less

A Fusarium-infected palm tree sits next to healthy palms on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering ... more

A Fusarium-infected palm tree sits next to healthy palmsl on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering from a tree fungus disease that is slowly killing them. less

A Fusarium-infected palm tree sits next to healthy palmsl on the Embarcadero near the Ferry building in San Francisco, Calif., on Tuesday, May 14, 2013. Several palm trees along the Embarcadero are suffering ... more